The Solvation of Cu2+ with Gas-Phase Clusters of Water and Ammonia

A detailed study has been undertaken of the gas-phase chemistry of [Cu(H2O) N ]2+ and [Cu(NH3) N ]2+ complexes. Ion intensity distributions and fragmentation pathways (unimolecular and collision-induced) have been recorded for both complexes out as far as N = 20. Unimolecular fragmentation is domina...

Full description

Saved in:
Bibliographic Details
Published in:The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Molecules, spectroscopy, kinetics, environment, & general theory, 2007-06, Vol.111 (24), p.5158-5165
Main Authors: Duncombe, Bridgette J, Duale, Khadar, Buchanan-Smith, Annabelle, Stace, Anthony J
Format: Article
Language:English
Subjects:
Ammonia - chemistry
Copper - chemistry
Gases - chemistry
Hydrogen Bonding
Ions
Macromolecular Substances - chemistry
Molecular Structure
Phase Transition
Solvents - chemistry
Water - chemistry
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A detailed study has been undertaken of the gas-phase chemistry of [Cu(H2O) N ]2+ and [Cu(NH3) N ]2+ complexes. Ion intensity distributions and fragmentation pathways (unimolecular and collision-induced) have been recorded for both complexes out as far as N = 20. Unimolecular fragmentation is dominated by Coulomb explosion (separation into two single charged units) on the part of the smaller ions, but switches to neutral molecule loss for N > 7. In contrast, collisional activation promotes extensive electron capture from the collision gas, with the appearance of particular singly charged fragment ions being sensitive to the size and composition of the precursor. The results show clear evidence of the unit [Cu(X)8]2+ being of special significance, and it is proposed that the hydrogen-bonded structure associated with this ion is responsible for stabilizing the dipositive charge on Cu2+ in aqueous solution.
ISSN:1089-5639
1520-5215
DOI:10.1021/jp0717286